Larger Xbox 360 HDD? How to?

Anybody know how I can avoid paying 100$ for a 120GB HDD for the 360 or how I can safely have a much larger HDD, I don't want to get anned from Xbox Live but I do want my Xbox to hold way more of my CDs.

Unlike PS3, you can't just get any Hard drive at a local computer store and attach to your 360, like PBninja said, xbox hard drives are specific to xbox only, You know how much money microsoft would lose ( sarcasm ) if they let you add any hard drive?

You'd be able to buy a cheap 20gig xbox and put a terabyte hard drive on it and still be saving alot of money :haha: